ArticlePhysical chemistry chemical physics : PCCP2021
Excited-state symmetry breaking in 9,10-dicyanoanthracene-based quadrupolar molecules: the effect of donor-acceptor branch length.
Article in Physical chemistry chemical physics : PCCP, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed, 24 citations in OpenAlex.
- Counterintuitive Fluorescence Blue Shift in Symmetry Breaking Dicationic Bis(indolium) with Two-Photon Absorption Properties for NIR Living Cell Imaging.Advanced materials (Deerfield Beach, Fla.) · 2026Article
- Exciton trapping with a twist.Chemical science · 2026Article
- Aggregates and Excitons: Excited-State Behavior of Platinum-Acetylide Two-Photon Chromophore-Doped Ormosil Glasses.The journal of physical chemistry. A · 2025Article
- Excited-state symmetry breaking in quadrupolar pull-push-pull molecules: dicyanovinylPhysical chemistry chemical physics : PCCP · 2023Article
- [2.2.2.2]Paracyclophanetetraenes (PCTs): cyclic structural analogues of poly(Open research Europe · 2021Article
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Authors and funding
4 authors at 3 institutions in 3 countries.
Funding
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Abstract
Excited-state symmetry breaking is investigated in a series of symmetric 9,10-dicyanoanthracenes linked to electron-donating groups on the 2 and 6 positions via different spacers, allowing for a tuning of the length of the donor-acceptor branches. The excited-state properties of these compounds are compared with their dipolar single-branch analogues. The changes in electronic structure upon their optical excitation are monitored by transient electronic spectroscopy in the visible and near-infrared regions as well as by transient vibrational spectroscopy in the mid-infrared. Our results reveal that, with the shortest branches, electronic excitation remains distributed almost symmetrically over the molecule even in polar environments. Upon increasing the donor-acceptor distance, excitation becomes unevenly distributed and, with the longest one, it fully localises on one branch in polar solvents. The influence of the branch length on the propensity of quadrupolar dyes to undergo excited-state symmetry breaking is rationalised in terms of the balance between interbranch coupling and solvation energy.
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